Trolley-wire support



W. w. HUNZI'CKER.

TROLLEY WIRE SUPPORT.

APPLICATION FILED Nov. 1918.

Patented 051. 12,1920.

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UNI-TED STATES PATENT oFFic.

wAL'ri-:RA W. HUNZICKEP, or MANsFIELD, oHIo, AssIeNoP. 'ro {rHE oHy-Io BnAss COMPANY, or MANSPIELD, omo, A ooRPoRA'rroivv o-F NEW JEnsEY.

TROLLEY-WIRE SUPPORT.

Application filed November 6, 191'8. Serial No. 261,326.

ToV all whom z't may concern Be it known that I, lWALTER W` HUN- zIoKnP., a citizen of the United States, residing at Mansfield, inthe county of Richland.

and State of Ohio, have invented certain new and useful Improvements in Trolley- Wire Supports, of which the following is a specication. l

This invention relates to a device for supporting a trolley wire for use in electric traction systems and relates more particularly to that class of devices known as trolley wire supports.

One of the objects of my invention'is to provide a device which can first be ,attached permanently vto its support and then clamped upon the. trolley wire by a single operation of one ofy the members composing my invention.y

With this and other objects set forth and herein disclosed, my invention consists in the construction and combination of parts asY hereinafter described and claimed.

In installing trolley wires it is the usual custom to first set the poles and install the span wire from pole to pole or other sup-Y porting means and then to install upon the span wire or other supporting means the device vused for suspending or supporting the trolley wire therefrom. The next operation`vl is to string the trolley wire and then secure the supporting device to the trolley wire,'thus anchoring and holding vthe same in position.v It is desirable therefore; to have* a device for securing the trolley wire to the span wire or other supporting means which can be operated in the simplest and hence the most economical and time-.saving manner, and in my invention I bring this about-by vthe mere operation of a single member by means of an ordinary wrench.

To show my invention more clearly I have set forth in the drawing one form of my invention as follows y Figure 1 isa sideelevation of my inventionY showing a'trolley wire secured thereto.

Fig. 2 is an end elevation of my invention shown in Fig. 1.

Fig. 3 is a part section of my invention showing the variousfelements and relation therebetween taken on the line 3-3 of Fiy 2; Y

4 is a sectional view o my invention taken online 4-4 of Fig. 1.

My invention as shown in the drawings Specification of Letters iPatent.l i 'Patnfediovcn consists of a hanger member 1 adapted to vbe supported from above byV means of the threadedV Vboss 2 (Fig. 3)V or the arms' 2 ig. 4). The form of attachment (2 Fig.-

3) 1s one generally used'v in: mine construction work where the' hanger is suspended dlrectly from the roof by means'of an eX- pansion or lag bolt having the lower protruding end threaded. v This hanger. can,` however, be modiiied by having arms thereon (2E Fig. 4) extending sidewis'ey for gripping a span wire which is ordinary' and common practice or any other Vwell known or suitable means may be provided for at'- tachment tothe well known pipe bracketarm. I

The hanger member 1 is filled withan insulating compound `3 and embedded in this is a stud bolt 4 provided with an enlarged head 5 and mounted inI the insula-v tion with suiicient clearance to permit of its rotation" and a slight degree of vertical movement. -To facilitate this action and assist in the-manufacture of the device, the stud 4 and the enlarged head 5 are inclosedv in a metallic casing 6. A YSecured to the stud 4 just below the lower face of the insulation 3 is a collar 7 provided with a plurality of vertical faces adaptedto receive a wrench or other simple means to rotate the collar -7 and stem 4. Below the plurality of vertical faces is a conical or beveled surface 8 adapted to coact with the lips 18 of the clamp members 13 t'omove theV lips 18 outward. f f

The collar 7 is shown as' secured to the stud 4 by means of a pin 9 seated in arecess 10 of the stud 4 and the recess v10 is olisuch sizeandV location with respect .to the pin- 9'as" topermit of a slight movement of thev collar withrespect to the stud 4 so that as thejaws of the clamp are-caused' to grip the trolley wire the collar 7 will move' relatively to-the` stud 4in a longitudinal direcreceive a suspension member 12 provided with a threaded socket, the threads of` which engage the threads of thestud 4. Surrounding theY suspension member v12 are twohinged orV pivoted jaws 13 secured together and to the boss 12 by means of the pin 14 which passes through counterpart lugs 15 on Vthe jaws 13. The ends of the pin 14'ja`re shownV as upset or headed at 16 in order to secure all parts together.

The lower edgeof the jaws 13 are provided with lips 17 so-shaped as to enter and engagerthe grooves of a trolley wire or to rengages with collar 7. v

The operation of my invention when 1nstalling the same in position consistsin rst 'j securing the invention to such overhead support as provided whichv may be an expansion bolt, a depending stud, ya cross sp anwire or a projecting bracket arm or other common and .well known means-used for supporting a-trolley wire. The collar 7 and stud 4.are rotated in one direction sufiiciently to disengage the conical surface 8 from the surface 19 of; the flaring collar 18 a sufficient distance (Fig. 3) to permit the jaws 13V to open sufficiently to receive thetrolley wire lbetween the lips 17. rlhe trolley' wire is then placed in position v between the lips 17 and the collar 7 `is rotated in the opposite direction fromthat previously operated, Yand thisrotation of the :collar 7 will cause the stud 4 to rotate which in turn will Y' cause the threaded suspension -member Y12 to be drawn upwardV together withl the aws 13 and the pin 14; this'is brought about through the threaded connection between-the stud 4 and the boss 12; Y Y 1 f As the jaws'13A move upward they will finally engage the conical surfacej8 offthe collar 7, and the surface 8 pressing against the surface 19 ofthe jaws 13 will cause the jaws 13 to be expanded or-forced outward at the top about the pin 14 -as a fulcrumand this action will cause the lips 17 to :engage the groove in the trolley wire 21 and cause the collar 7 to strongly engage the lower face 20 of the insulation 3,(F1g. 4). As the rotation .of the vstud 7 is continued bymeans of a wrench applied to the collar 7, the jaws Vwill beforced farther apart at the top and the tendency will be for.- the lips y17 .to be forced'inward toward each other, thereby increasing the gripping action upon the trolley j wiref21 until the wireis securely gripped in place. 1 v j, Y

1n order to disengagey the trolley wire fromV my support, it ismerely necessary to reverse the operation, that is, rotate the colthe conicalsurfacel 8 on the lar 7 and attach stud 4 in the reverse direction which will force the suspension member 12rdownward together with the aws 13 secured thereto, thus relieving the pressure upon the lips 18 and permitting the lips 17 'of the jaws 13 to open outward. Y

I have illustrated and described only one method vof .carrying out my invention, still many modifications of the arrangement which the foregoing 'description and drawings will fully reveal and Vwhich others can, by applying current knowledge, readily adapt and which fromthe standpoint of thev prior art, fairly constitute essential characteristics of the generic'and specific aspect f of this invention, and therefore such adaptations should and are intended to be comprehended within the meaning and range of equivalency of the following claims.

Having thus described `my invention', what I claim as new and desire toY secure 'by Letters Patent is:

1. A trolley wire support comprising in means for rotating the collar and stud toY draw the jaws into' engagement with the conical Ysurface on the collar and thereby move the jaws into engagement with the trolley wire. 'j

`2. A trolley wire support comprising in combination a pair of clamping jaws se cured together, a threaded suspension means mounted between the clamping jaws,'a rotatable stud inthreaded engagement with the suspension means and secured toa support, a` conically shaped member securedV tothe stud and engaging the supportV and jaws and adapted toV move the jaws to'gripa wire when the stud is rotated andthe jaws move toward the support.

3. A trolley wire support comprising in combination a hanger body,rmeans"to support the hanger body, insulation secured in. the body, a metal shell provided Vwith a two-part cavity embedded .in the insulation, a rotatable studwith -an enlargementpositioned inthe two-part cavity and projecting therefrom,a collar secured to the stud'and rotatable therewith, a,V conical surface on Vthe collar, a threaded endon the. stud proj'ecting beyond the collar, a threaded'suspension member mounted on therthr'eaded end of the'stud and adapted to'rotate relatively to the stud, a pairofaws secured,A to

lie

the suspension member, a pin engaging the jaws and suspension member to secure the boss and jaws together, means on the jaws to coperate with the conical surface on the collar, lips on the jaws to engage a trolley wire and means on the collar whereby the collar and stud are rotated to draw the jaws into engagement with the conical surface on the collar, thereby moving the jaws into engagement with the trolley wire.

4. A trolley wire support comprising in combination a pair of clamping aws adapted to clamp a trolley wire, a threaded suspension means, a pin pivotally securing the jaws and suspension member together, a hanger body, a rotatable stud mounted in the suspension means and having threaded engagement therewith, insulation interposed between the stud and hanger body, a conical member mounted on the stud to rotate therewith and to engage the jaws and hanger when rotated to force the jaws into stronger engagement with the conical member to cause the jaws to clamp the trolley wire.

5. A trolley wire support comprising in combination a pair of clamping jaws to clamp a trolley wire, a threaded suspension means secured to the jaws, a pin pivotally securing the jaws and suspension -means together, a supporting member provided with a rotatable stud, a member having a conically shaped portion secured to the stud and movable longitudinally thereof and rotatable therewith and engaging the supporting member and the jaws and adapted to expand the jaws into engagement with the trolley wire when the conical member and the stud are rotated. a

In testimony whereof I affix my signature.

WALTER W, HUNZIOKER. 

